Sheet-feeding apparatus for printing-presses.



G. HERMANN. SHEET FEEDING APPARATUS FOR PRINTING PRESSES.

APPLICATION FILED NOV. 20, 1908.

Patented Nov. 30, 1909.

CASPAR HERMANN, OF LEIPZIG-KL. ZSGHOCHER, GERMANY.

SHEET-FEEDING APPARATUS FOR PRINTING-PRESSES.

Specification of Letters Patent.

Patented Nov. 30, 1909.

Application filed November 20, 1908. Serial No. 463,580.

To all whom it may concern:

Be it known that I, CASPAR HERMANN, mechanical engineer, a citizen of the United States of America, and resident of Leipzig- Kl. Zschocher, Luckaustrasse 12, Kingdom of Saxony, German Empire, have invented a new and useful Improvement in Sheet-Feeding Apparatus for Printing-Presses, of which the following is a specification.

The present invention has for its object a sheet feeding or delivery apparatus for printing presses and more particularly for the kind of printing presses, in which the sheet-pile is automatically fed or supplied in a vertical direction. In such sheet feeding or delivery apparatus a ledge of preferably triangular shape'and provided with a sharp upper edge is arranged, against which the top sheets of the pile will strike. Above this ledge or transverse bar a series of rollers or small cylinders are adjustably arranged, fixed to a common shaft and rotating at intervals in one direction only. When the to sheet of the pile meets the rollers or smal cylinders mentioned, it is delivered over the sharp edge of the ledge or transverse bar to 1 a series of feeding or transporting rollers.

In the accompanying drawing, Figure 1 is an elevation and partial section according to line AB in Fig. 2 of one form of the sheet feeding apparatus for cylinder printing presses, embodying my invention.

a is the paper sheet pile which is situated on a plate 6 moved in an upward direction at intervals in a known manner and fixed to the upper end of a screw-spindle 6 passed through a worm-wheel formed in the shape of a nut d.

The sheet feeding apparatus according to the invention for delivering the top sheet of the pile to the printing cylinder in the direction of the arrow 1, shown in Fig. l is actuated by an inclined shaft e supported at the outside of the frame f of the printing-press. The lower end of this shaft carries a bevelwheel 9 meshing a bevel-wheel h fixed to the shaft 2' supported by the rear part of the frame 7". A pinion is fastened to the shaft i in front of the bevel-wheel h engages with its upper part a pinion Z and with its lower part a second pinion m. The shaft n of the upper wheel 1 carries a wheel 0, from which the wheel 9 is rotated by the pinion p in the same direction as the Wheel 0, from which the upper feeding roller 7' fastened together with the wheel 9 on a common shaft is rotated. Below the feeding roller mentioned a second feeding or transporting roller t is arranged fastened to a shaft carrying ,a'

bevel-Wheel r, as shown in Fig. 2. This bevel-wheel r engages a bevel-wheel 8 fixed to a shaft supported in a parallel direction to the front wall of the frame f and carrying also a series of bevel-wheels s for actuating another series of feeding rollers t which are rotated by the small bevel-wheels u for the purpose of transporting along the paper sheets to be fed or delivered.

For the intermittent upward movement of the plate Z) carrying the paper sheet pile the crank o fastened to the shaft 2' is connected by the connecting-rod to with the lever w loosely surrounding with its lower eye the shaft of the screw 3. .The pawl 2 arranged on the front surface of the lever w mentioned engages the teeth of the ratchet-wheel 2 fastened to the screw-wheel g in such a manner that on each revolution of the crank 41 and on each oscillating movement of the arm w the ratchet-wheel 2 is rotated or moved along one or more teeth, whereby the screwspindle 0 together with the sheet pile a carried by it is moved upward by the rotating screw 3 and the screw-Wheel engaging it. The top sheet 4: of the pile thus passes over the upper sharp edge of a ledge or transverse bar 5 consisting of india rubber, wood, cork or the like and being adjustable by a set-screw 6.

Above the ledge or transverse bar 5 are situated a series of for instance three rollers or small cylinders 7, fastened on a common shaft. A transporting roller 8 is arranged directly before and below such rollers or cylinders 7 which, together with their com mon shaft, may be precisely adjusted by set sc pews in relation to the top sheet 4 of the p1 e a.

For the purpose of drawing such top sheet 4 od the sheet-pile with the aid of the rollers a disk 9 is secured or fastened laterally to the wheel m and in such disk a radial slit the latter are at rest during the downward movement of the loop because of moving the pawl over the teeth of the ratchet-wheel 14 without action. The rollers 7 mentioned which preferably are composed of cork feed 15 or deliver the top sheet of the sheet-pile a over the ledge or transverse bar consisting of india rubber, cork and the like solely by ,the soft friction produced during the contact between said rollers and the top sheet and by the intermittent rotary movement of the same. The delivered sheet begins by passing the first transporting-roller 8situated laterally of the ledge 5 and hereafter runs over the following transporting-rollers t which feed or deliver the sheet moved in an upward direction, to the printing cylinder of the printing press. In the meantime the sheet pile a moves upward automaticallyin :1 known manner for a distance corresponding to the thickness of a paper-sheet whereupon the play of the parts described will begin again.

\Vhat I claim is In a printing press, the combination with a paper sheet plle table, means for automatically and intermittently raising the table, feeding rollers in position to act against the top sheet of the paper pile on the table and a shaft to which the feeding rollers are fastened, of an oblique ledge provided with an upper sharp edge in position to be touched by the sheets in the upper part of the pile, the upper edge of said ledge being situated below the feeding rollers and nearly coinciding with the line in which the rollers contact with the sheets, vertically adjustable bearings for the feeding rollers to adjust them to suit the thickness of the paper and set screws serving both as supports for the oblique ledge and for adjusting the ledge, substantially as and for the purpose specified.

In testimony, that I claim the foregoing as my invention, I have signed my name in presence of two witnesses, this 9th day of November 1908.

CASPAR HERMANN. W'itnesses PAUL ARRAs, CLARE SIMON. 

